Refinishing device



p 1931- J. v. BUECKERMANN 1,824,327

REFINISHING DEVICE Filed April 8. 1929 I N VEN TOR.

B TfWMM 5 M A TTORNEYS Patented Sept. 22, 1931 UNITED STATES PATENT OFFICE BEFINISHING DEVICE Application filed April 8, 1929. Serial No. 358,508.

My invention relates to a device for refinishing valves and valve seats, particularly poppet valves and'poppet valve seats used'm internal combustion engines.

Objects of the invention are toutilize the valve seat for holding the device when refinishing the valve and to use the valve as a guide when refinishing the seat. Thus both the valve and its seat may be refinished while the valve is in position.

Another object is to provide a simple, portable device for the above purposes.

Still other objects reside in novel details of construction and in novel combinations .and arrangements of parts, which will more fully appear in the course of the following description.

The same characters designate similar parts in the several views.

Figure 1 is a vertical section of a portion of an internal combustion engine, showing the present device in operative position.

Figure 2 is a view similar to Figure 1, but partly in elevation and showing locking means hereinafter to be described.

Figure 3 is a section takenon the line 3-3 of Figure 1.

Figure 4 is a perspective view of the shell of the present device.

Figure 5 is a section taken on the line 5-5 of Figure 2.

Figure 6 is a broken elevation of a detail hereinafter to be described.

Referring more specifically to the drawings, the reference numeral 5 designates generally an internal combustion en 'ne having a poppet valve seat 6 and a gui e-way 7 for the stem of a poppet valve.

The numeral 8 designates the poppet valve, which has a stem 9 disposed in the guide-way 7 qThe valve has a face 10 that engages the valve seat 6 during the operation of the engine. The valve shown has a groove 11 in its head, as is customary with many poppet valves.

ameter o My refinisher comprises a shell shown in perspective in Figure 4. The shell has a truncated, conical body portion 12 that tapers to a hollow, threaded extension 13 at one end. The opposite'end merges into an annulus 14 o apertured at 15. The threaded extension 13 and conical body 12 are slit as seen at 16.

The conical body portion 12 is lined with an emery or abrasive paper or fabric 17. The ends of the abrasive material are inserted into a channel-shaped members 18, shown in Figure 6, the sides of which are crimped together to hold the abrasive material. I

The abrasive material 17 is placed in the conical body 12 and the clamps 18 at the ends 5 are inserted in the same portion of the slit 16, as best seen in Figure 3. By crowding the clamps 18 into the same part of the slit, they are firmly held in place.

The exterior of the body member 12 is covered with similar emery or abrasive material 19. Clamps 20 at the ends of the material 19 are similar to the clamps 18. The clamps 20 are crowded into another portion of the slit 16 to firmly hold the material 19 in place.

A nut 21 is screwed on the threaded extension 13. The interior diameter of the nut is .preferablfy slightly less than the exterior dithe threaded extension 13, so that the separated sections of the extension 13 may be drawn together by the nut.

The nut has a rim 22 interiorly beveled to engage the edge of the abrasive material on the outer surface of the body 12 when the nut is screwed home, to assist in holding the abrasive material in place.

It is preferred to make the bore of the threaded extension of larger diameter than that of the stem of any valve now used in internal combustion engines and to place an adapter 23 in this extension. Adapters having different sized bores may then be used for different sized stems.

- Means for rolating the valve has been indicated in Figure 1. This means comprises 90 ace of the valve, the device is seated on the valve seat asshown in Figure 1 and held in place by hand. The valveis then rotated rela-' and an operating-element including signature.

1,824,327- I. A I x adapted for engagement with a valve-seat, and an inner face adapted for frictional engagement with a valve, the element having alined apertures for the application of a key, 7 a'-rin adaptedto engage in a slit of the valve, and E key extendin t rough the ring and intothe apertures'of t e grin element.

In testimony whereo I have aflixed 'my JOHN V. BUEGKERMANN.

tive thereto, and at the same time its face/is\ depressed against the abrasive materialon the interior of the shell.

Thisoperation refinishes the face of the valve whlle it is in its normal operative position.

taneously refinished by rotating the present device by hand orotherwise. To refinish the seat, the present device'is I placed upon same'with the valve in position, as shown in Figure 2. The valve and shell are It is thought apparent that the valve may -be held statlonary by the means shown and the face of the valve and the valve seat simulthen locked together by the key 26. By rotation-of the valve and device bythe handle 25, 10 the abrasive material 19 refinishes the seat.

The vialve and its stem in this instance act as 4 en the exterior diameter of the extension is slightly greater than-the interior. di- 35 ameter of the nut 21, the nut is then used to clamp the sections of the extension upon the ad zlt pier, to hold thelatter in place.

, advantage of refinishing the valvewhile it is in (place and the advantage of using .3; the valve an stem as a guide whenrefinishing the seat are that common inequalities of they will be refinished alike.

My device, therefore,

the valve and seat will not be disturbed, and p not only refinishes, 45 but after refinishing the valve and seat fit better than they did before and much better than if'the valve and seat were refinished without any relation to each other.

Where the valve head does not have a 50' groove '11" or other depression or depressions, such maybe made in the'valve head, or. the valve maybe rotated by any other suitable means while the present device is held against the face thereof. 55 What I claim'and desire to secure by Letters Patent is:

1. A refinishing device, comprising a body adapted for engagement with a valve seat, an abrasive member on the body, an adapter on c3 the body, to fit around a stem of a valve cooperative with the seat, and a member on the body adapted to clam in one operation the abrasive member and t e adapter to the body.

2. Arefinishin device comprisin a grind- 05 ing-element having an outer grin 'ng face 

